Motor-equipped snow plow



April 4, 1939. H. J. BEHRENS ET AL MTOR-EQUIFPED SNOW PLOW Filed Oct. l2, 1936 5 Sheets-Sheet l I fff* April 4, 1939. H, J, BEHRENS ET AL 2,152,860

MOTOR-EQUPPED SNOW PLOW Filed O'Ct. l2, 1936 5 Sheets-Sheetv 2 E s E @/7 mf .wkplwfwl @M IMHWW/ April 4, 1939.

H, J. BEI-:RENS ET AL 2,152,860

MOTOR-EQUIPPED SNOW PLOW Filed OC'L. l2, 1936 5 Sheets-Sheet 3 pri 4, T939. H. J. BEHRENS ETAL MOTOR-EQUIPPED SNOW PLOW Filed Oct. l2, 1936 5 Sheets-She 4 April 4, 1939 H. J. BEHRENS r-:T AL 2,152,860

MOTOR-EQUIPPED SNOW PLOW 5 sheets-sheet 5 `Filed Oct. l2, 1936 Patented Apr. 4, 1939 UNITED STATES PATENT OFFICE MOTOR-EQUIPPED SNOW PLOW Minnesota Application October 12, 1936 Serial No. 105,252

15 Claims.

This invention relates to a snow plow and particularly to a snow plow having one or more rotors which operate to discharge the snow moved to them.

It has been the common practice heretofore to propel the plows along the highway by an automotive vehicle and to drive the rotors from the motor of said automotive vehicle. In one well known type of plow this was done by a connection between the crank shaft of said motor and the driving shaft for said rotors.

With this method of both propelling the plow forward and driving the rotors by the same motor, serious difficulties have been encountered. in order to properly discharge the snow it is desirable to have the rotors run at a constant speed or at least at a minimum speed. The snow, however, varies in weight and hardness and it is impossible to propel the plow at a uniform speed. 'I'he snow is often packed very hard and the plow can only be progressed into the snow very slowly. One demand is therefore being made on the motor for high speed and another demand being made on the motor which causes the motor to use a slow speed. This gives difculty in getting the proper power with which to progress the plow and to operate the rotors. Difficulty is also experienced in getting enough power to take care of the required loads or work,

It is an object of this invention to provide a plow having one or more rotors, with one or more internal combustion motors carried by the plow which can be run at uniform speed to drive the rotor or rotors so that the plow may be progressed by the motor of the automotive vehicle, which latter motor is thus relieved of the rotor drive.

It is a further object of this invention to provide a snow plow having a pairlof rotors for discharging snow, with one or more internal cornbustion motors provided only to drive the rotors, suitable connections being made between said motors and rotors.

It is still another object of the invention to provide a snow plow having one or more internal combustion motors for driving the rotors and a novel and efficient construction of mounting for said motors.

It is another object of the invention to provide a snow plow having a pair of rotors for discharging snow, with a pair of internal combustion motors, said motors having pinions meshing with a common gear for driving said rotors.

It is another object of the invention to provide a snow plow having a pair of discharging rotors,

a shaft to which said rotors are secured, a second shaft connected to said shaft, a gear secured to said second shaft, a casing enclosing said shafts and gears and a pair of motors carried by said plow having casings secured to said casing.

It is also an object of the invention to provide a novel and eiiicient structure of rotor for a snow plow.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawings, in which like reference characters refer to similar parts throughout the several views and in which:-

Fig. 1 is a view partly in plan and partly in horizontal section;

Fig. 2 is a view in side elevation of the plow, some parts being indicated in dotted lines;

Fig. 3 is a view in rear elevation of the plow, some parts being broken away and others shown in vertical section;

Fig, 4 is a vertical section taken substantially on line 4--4 of Fig. 3 or Fig. 1 as indicated by the arrow;

Fig. 5 is a view in side elevation of the rotor;

Fig. 6 is a central horizontal section of the rotor and driving shaft;

Fig. 7 is a view in end elevation of the central part of the rotor, some parts being shown in vertical section;

Fig. 8 is a vertical section through the clutch portion of the motor and the drive therefrom;

Fig. 9 is a horizontal section mainly through the rotor shaft of a modified form of construction and partly above said shaft; and

Fig. 10 is a vertical section taken on line Ill- I0 of Fig. 9 as indicated by the arrows.

Referring to the drawings, a snow plow is shown comprising a central moldboard I0 which is of the V type with a central forwardly directed point. The sides of moldboard IU extend rearwardly to the open front ends of discharge chutes II. Side plates or moldboards I2 are disposedA illustrated as in the form of an angle bar. Platesy I5a extend horizontally of the plow adjacent the bottom thereof at the outer sides of chutes II and a plate I5 extends horizontally between chutes I I at the bottom thereof and some distance beyond the same. Pairs of lugs |52) project rearwardly from the outer moldboards I2 and are apertured to have connected thereto the push bars for propelling the plow. The chutes I l have curved bottom portions I la and extend upwardly, being rectangular at their upper ends. Brackets I6 are secured to the sides of the chutes and have pivoted thereto deflecting members or chutes I1. The chutes I1 may be swung on or about their pivots I8 to deflect the snow to one side or the other of the plow. Plates I 9 are secured to the inner sides of chutes Il and to the rear of the central moldboard and have bearing blocks 20 supported thereon. Bearing hubs 2| have rounded or curved annular portions resting in semicylindrical grooves in the top of blocks 25. Upper blocks 22 rest on top of the `curved annular portions of hubs 2| and headed and nutted bolts 23 extend through blocks 25 and 22 and through the plates I9, thus securing said blocks in position. Upper blocks 22 also have semi-cylindrical grooves receiving hubs 2|. The grooves in blocks 20 and 22 are also curved transversely or longitudinally of hubs 2| and on a longer radius than the annular curved portions of hubs 2l so that there would be some freedom for rocking movement. Hubs 2| have roller bearings 25 shown as of the Timken type therein and a shaft 25 is journaled in said bearings. Shaft 25 extends through and is secured to the hubs of rotor members 26. These rotor members are shown specifically in Figs. to 6. Each comprises a central annular plate 3U illustrated as having a shoulder-forming bear 35a extending thereabout. A hub 3| has a, flange 31a secured to one side of plate 30 and a hub 32 has a flange 32a` secured to the opposite side" of plate 35, said flanges being secured by a plurality of circumferentially spaced headed and nutted bolts 33 extending through said flanges and plate 35. The outer edges or peripheries of said anges engage the shoulders formed by beads 30a. Hub 3| has an outer flange 3|b and hub 32 has an outer flange 32h. A roller bearing 35 is disposed in hub 3| in which may run a reduced portion 25a of shaft 25. A plate 35 is disposed between the end of bearing 35 and the shoulder of shaft 25. A plate 56 is threaded on shaft 25 and engages the outer end of bearing SII. Beyond plate 35 shaft 25 has a splined portion 25h and a driving member 31 is bored and slotted to t portion 25h so as to rotate with shaft 25. Member 31 has a plurality of radial slots or recesses 31u formed in its outer end and one or more frangible headed pins 38 extend through holes in hub 32 and into the recesses 31a. Hub 32 has outwardly projecting lugs 32o apertured to receive a split key 32d which holds the pin 38 in place. An end cap 39 has a semi-spherical end and also has a flange engaging the outer end of member 31 to which it is connected by the screws 4I). 'Ihe rotor comprises a plurality of blades or scoops il I, the same being trough-shaped or of concavo-convex form. Blades 4| are shown as formed of sheet metal plates, said plates being Widest at their central portions and tapering toward their ends. 'I'he ends of said plates forming the sides of said blades or scoops are secured respectively to the inner sides of flanges 3 Ib and 32h by and are swingable about the headed andv nutted bolts 52. Plates 53 which are elongated and of general crescent form are disposed at either side of plate 30 and connected thereto bv headed and nutted bolts 42o. Plate 3!) is prothereon.

vided with additional holes 3Go through which bolts 42C may extend with blades 4| in different positions. Blades 4| are provided at their ends adjacent the periphery of plate 55 with slots 4ta to accommodate the swinging movement of said plates when they are adjusted to different positions. Plates '33 extend along and are connected to the rear or convex sides of the blades 4| in any suitable manner' as by welding. As shown in Fig. 6 plates 55 diverge toward their outer ends. A bead or rod 44 of very hard metal is secured to the edge of blades III in any suitable manner as by Welding.

A beveled gear t5 is secured to shaft 25 and meshes with another beveled gear GB, which latter gear is secured to a shaft 51 extending at right angles to shaft 25 and rearwardly of the plow. Hubs 2| form part of and are secured to a casing i8 which encloses shaft 25 and shaft 51 together with gears 55 and 46. The ends of hubs 2i are closed by plates 49. Casing |58 has a forward portion with a circumferential flange 58a. to which is secured a cover plate 5D by the circumferentially spaced screws 5|. Casing 43 has a rearwardly extending cylindrical portion 48h extending to and communicating with an annular portion 58chaving a projecting flange 53d. Portion 55o has projecting forwardly therefrom frusto-conical portions 58e, each of which has a peripheral flange lBf disposed in a plane at right angles to the axis of shaft 51. Portions 48chave central hubv portions each having a bore adapted to receive a bearing 52. A casing 53 has a flange 53a mating with flange 58d to which it is connected by a` plurality of circumferentially spaced screws 551i Member 53 has bores therein axially alined with said bores in portions 43e adapted to receive bearings 54. Member 53 also has an opening covered by a plate 53e'. Shaft 41 is journaled in spaced bearings 41a disposed in casing portion 481) and said shaft has secured thereto a comparatively large spur gear 55. A nut 55a, is threaded on the end of shaft 41 holding gear 55 Gear 55 is disposed in. a chamber formed by casings 48 and 53. The outer end of casing 53 has a projecting horizontal lug 53d apertured to receive a stud 51 threaded at both ends and having a/nut 58 threaded thereon engaging the lower side of lug 53d. Stud 51 extends through an aperture in a horizontal flange of an angle bar 59 extending between and secured to the rear sides of chutes I I. A coiled compression spring 65 is disposed between lug 53d and the bottom of angle bar 59. A coiled compression spring 5I is disposed on top of bar 59 on the top of which is disposed a washer 62. Stud 51 extends through the springs 60 and 6I and through washer 52 and has threaded on top of washer 62 a nut 55. With this construction it will be seen that the casings 53 and 43 are resiliently supported at the rear end by the springs 60 and 5|.

A pair of motors 65 are provided and these motors are illustrated as and are preferably of the internal combustion type. While various motors might be used, in practice the motor of the modern Ford V8 truck has been used. Each motor has a rear end casing 65a which in the truck is adapted to be bolted to the end of the change speed gear casing. In the present invention casing 55a is bolted to flange 48f by the circumferentially spaced bolts 66.

Each motor 65 has an angle bracket B1 secured to the front of its crank case at each side, which brackets rest upon coiled compression springs 58. One spring 68 rests on top of a flange 50a extending at the top of cover plate 50. The other spring 68 rests on top of a flange 48g formed on casing 48. Coiled compression springs 1li rest yrespectively on each bracket 61 and are surmounted by washers 1|. Headed and nutted bolts 69 extend through the springs 68 and 10 and through brackets 51 and washer 1|, one of said bolts extending through ange a and the other through flange 48g, said bolts holding said springs and brackets in place. The bottom of the radiator casing 65h has an outwardly projecting ange 65e at each side which rests upon a coiled cornpression spring 12. One spring 'i2 rests on flange 50a; and the other rests upon the front portion of flange 48g. Coiled compression springs 13 rest on top of flanges 65o respectively and are surmounted by washers 14. Headed and nutted bolts 15 extend through springs 12 -and 13, through washer 14 and anges 65e. One of said bolts exextends through flange 50a. and the other through flange 48g, said bolts acting to hold said springs and flange 65e in position. It will be seen that with this construction the front parts of the motors 65 are resiliently supported.

Motor 65 is shown rather diagrammatically in outline, the cooling fan 65d being shown and the water connections 65e and 65j which extend to the radiator. The pulley 65g which drives fan 65d is shown as Well as another pulley 65h which is provided to drive the governor 51'. The governor is provided to secure a constant speed for the motor. The governor may be any one of the well known commercial types and per se forms no part of the present invention.

The motor E5 has the usual ily wheel SIJ secured to the crank shaft thereof, said flywheel having a surface engaged by the clutch plates 8| of the clutch used with the motor. This clutch will be used in the plow. Said clutch comprises another annular member 82 adapted to engage the side of the clutch plates 8| opposite member 80. Member 82 has projecting lugs 82a to which are pivoted respectively the outer ends of levers 83. Levers 83 are pivoted intermediate their ends to and are carried by an annular plate 84, hava flange 86a secured to flywheel 8D. Plate fifi has recesses formed therein adapted to receive coiled compression springs 85, one end of each of which seats against plate 84 and the other end of which seats against member 82, said latter member having projections B2b disposed within said springs. A member 8'6 is carried on and slidable on a shaft 81, which shaft has a splined end 81u fitting in a hub Sta to. which clutch plates 8| are secured. An annular plate 88 surrounds shaft 9,1 and member 86, the same being adapted to rot-ate against ball bearings 89 carried thereon and by member 86. Plate 88 is adapted to engage the ends of adjustable bolts or pins 90 carried in the inner ends of leversI 33. Member 86 is provided with projecting lugs 86a engaged by the forked end of a clutch operating lever 9| pivoted on a shaft 92 journaled in casing portion 48e. Shaft 82 is oscillated by a lever 93 secured thereto at the outer side of casing portion 48e. Member 8G is moved to normal position or retracted by tensile coiled spring 94 secured thereto and to casing portion 48e. Shaft 81 is journaled in bearings 52 and 54. Each shaft 31 has a pinon 96 secured thereto between the bearings 52 and 54, which pinions mesh with gear 55.

In Figs. 9 and l0, a modified construction is shown which is used in plows where the rotor shaft is of considerable length and in which it could not be put in place in one piece. A moldboard |00 is shown quite similar in construction to moldboard IU but which is used on a plow not having the outer moldboards I2. A central shaft is used which is journaled in bearings |02 spaced longitudinally thereof and secured in a casing |03 which takes the place of casing 48. A beveled gear |64 is secured to shaft |0| by a key |05 and meshes with another beveled gear |06 secured to a shaft Iiil by a key |08. Shaft |61 is in all respects the same as shaft i1 already described and casing |53 has therein a bearing |09 for shaft |l1. Bearing |09 corresponds` to bearing 41a and casing IHS extending rearwardly from bearing IUS is in all respects identical with casing 48 already described. Casing |513 at its front end is provided with a flange w3c and is closed by a plate I I@ secured to flange |8311 by the circumferentially spaced bolts I I. Casing |03 has lateral extensions Ilib provided at their outer ends with flanges w3c. An elongated casing ||2 has an enlarged end H241 which is connected to flange H33 by the circumferentially spaced bolts H3. There is, of course, one casing I|2 at each side of casing |93 and casings i I2 project through the sides of the moldboard ISG. The end ||2a of casing |52 is, as shown, of enlarged form and hasI a rounded or partly spherical surface. This enlarged end is received in a split bearing, onehalf of which H4 is disposed beneath the moldboard |69, engages the same at one side and is Welded thereto. In addition a plate I|5 of general segmental form extends around the periphery of member H4 and is bent or warped so as to lie against the moldboard it and be welded thereto. Member IM is provided with oppositely projecting lugs Hdd. Another one-half bearing IIG extendsl around the outer side of enlargement IIZa and has projecting lugs ila secured to lugs Illa by the bolts I l1. It will be seen that there is provision for some movement of casing l2 in the bearing provided by members H4 and I l5. The outer terminal ends of shaft It! beyond bearings |02 are splined throughout their peripheries. Each of said ends extends' into a splined sleeve IIS to which it is thus connected. Shafts I I9 have splined inner ends projecting respectively into the sleeves I I8 and are thus connected to said sleeve to be driven byshaft IElI. A sleeve IZ@ is' disposed between bearing |Ei2 and a collar lEI secured to the inner side of portion ||2a of casing Ilf, said collar being secured by circ-umferentially spaced screws |22. A cylindrical sleeve |23 is secured in the outer end of casing ||2 and projects beyond said end. Shaft H9 projects through and beyond casing H2 and sleeve |23 and has an outer splined end fitting in the splined bore of a block IM. Block |24 is similar to member 21 already described and forms the driving member for the rotor, the central portion of which is shown as I 25. Rotor hubs |26 and |21 are bolted to the opposite sides of portion |25 just as shown in Fig. 6. Hub |21 is driven from member E24 by frangible pins |28 extending through slots EMOL in the outer flanged end of member 24. Pins I 28 are the same as pins 38 and are similarly held by Cotter pins or split keys |29 extending through spaced lugs |21a on member |21 which are simiiar to the lugs 32o already described. Hub IES carriesI two longitudinally spaced bearings |33 just as does hub member 3|, a collar II being disposed between the inner bearing and the end of casing I2. Hub members |26 and 21 have iianges |2617 and |2119 similar to the flanges 3Ib and 32h to which the rotor blades will be connected as shown in propelling power.

Fig. 6. As stated, casing I 03 is similar at its rear end in all respectsto casing 48 and will have the portions similar to portions 48e and flanges similar to flanges 48]t to which the motors will be connected. Casing |03 will have extensions similar to extensions 658g, whose position is indicated by dotted lines mild in Fig. 9. Plate lll) will have projecting ilanges similar to the flange 58a on plate 58, the position of which is indicated as ila. The lower part of the radiator casing similar to the flange 65C is indicated in dotted lines in Fig. 9. The positions of springs |59 and 12 are indicated in Fig. 9 as are the positions of springs 68 and l2.

From the description of the structure shown in Figs. 9 and 10 it is seen that the assembly can be quite easily made. rlhe shafts i9 can be placed in position endwise. Shaft is reversible if desired. It will also be seen that casing |83 can rock about the axis of shaft lill in the bearings H4 and H5 just as casing 48 can rock in the bearings formed by members 28 and 22. Casing |03 will be supported at its rear end by springs exactly as is casing 48 or casing 53 secured thereto.

In operation, a plow will be propelled forwardly to clear the sno-w by an automotive vehicle, such as a truck or tractor, to which it will be connected by suitable push bars. The motor of the automotive vehicle will thus furnish the Motors S5 will be operated and when it is desired to operate the rotors, the operator Will move lever 93 to engage the clutch and connect shafts 8l to the motor crank shaft. Shafts 8l through the pinions 96 will drive gear ,55 and shaft il will thus be driven. Shaft 25 and the rotors will be driven through gears l5 and 46. As stated, the motors |55 will be run at constant speed and the rotors 26 will thus be driven at constant speed and will have ample power to discharge any snow moved thereto. The operator will thus not have to give any attention to the driving of the rotors. The plow can be advanced into the snow as rapidly as possible by the motor of the automotive vehicle. The mounting of the .motors insures that there Will be no binding or twisting of shaft 8l. It will be noted that the casing t8 which carries the motors is mounted with S-point support. The same is mounted on the bearing box 28 and has a central or intermediate mounting through lug 53d which is a yielding mounting. This yielding mounting will give opportunity for some adjustment between shaft 25 and the casing i8 so that there will be no binding. It will be noted that the casing B8 is movable about the axis of shaft 25 in one direction and is controlled in this movement by the spring mounting comprising springs 68 4and 6|. snow is moved rearwardly and laterally by the moldboards I and I2 into the chutes |I. As shown in Fig. 2 the front lower part of the chutes is substantially in vertical alinement with the axis of the rotors and the ends of the blades or scoops lll pass rather close to the bottom of the chutes. As the rotors revolve they propel the snow upwardly through chutes and it is discharged to one side or the other by the deflectors I1. The rotors are of simple, rugged and eifrcient construction and particularly designed foi` very heavy duty. 'I'he plow frequently encounters large pieces of ice and boulders which are hidden by the snow and these must be discharged by the rotors. Large pieces are broken up by the rotors before passing out through the chutes.

It Will be understood that the Should the rotors strike some very heavy or rigid object the pin or pins 38 will be sheared and the shaft 25 will then run idly in the bearing 34. The rotor can then later be reattached to the shaft by a new pin or pins 38.

With the construction shown in Figs. 9 and 10 the rotors are driven from gear 55 through shaft |01, gears |84 and |86 and through shafts IUI and H9. Should the shear pins |28 break the rotor will run idly on the bearings |38 carried on sleeve |23.

From the above description it is seen that applicants have provided a novel, simple and very eflicient construction of snow plow. The plow will have ample power fo-r the intended duty and the rotors can be driven at constant speed regardless of the power used to push the plow into a drift or hard tract of snow. The motors for driving the rotors are as described mounted directly on the plow and a novel, efficient and flexible mounting is provided for them. The parts have been amply demonstrated in actual practice and found to be very successful and eiicient.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which generally stated, consists in a device capable of carrying out the objects above set forth in the parts and combinations of parts disclosed vand defined in the appended claims.

What is claimed is:

1. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, rotors for discharging snow disposed at either side thereof, means for moving snow to said rotors, a shaft extending between said rotors on which said rotors are mounted, driving means for said shaft, a casing for said last mentioned means, a pair of internal combustion motors rigidly secured to said casing, resilient means also supporting said motors and a second driving means secured to said motors for driving said rst mentioned driving means.

2. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a moldboard secured to said frame, rotors for discharging snow mounted on said frame to which snow is moved by said moldboards, a shaft on which said rotors are mounted, a second shaft for driving said shaft, an internal combustion motor, means on said frame on which said motor is movably mounted, resilient means also supporting said motor .and gearing connecting said second shaft and motor for driving said shafts and rotors.

3. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, spaced rotors for discharging snow, means for moving snow to said rotors, means extending between said rotors on which said rotors are mounted, a casing enclosing said means, a pair of internal combustion motors each rigidly secured at one end to said casing and resilient means on said casing for supporting said motors at their other ends.

4. A snow plow adapted to be propelled by an automotive Vehicle having in combination, a frame, a pair of rotors for discharging snow, a shaft coaxial with said rotors for driving the same, a pair of internal combustion motors for driving said shaft and a movable member for supporting said motors having a three-point support on said frame.

5. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a pair of rotors for discharging snow, means for moving snow to said rotors, a shaft extending between said rotors to which said rotors are secured, a second shaft for driving said first mentioned shaft extending at right angles thereto, a gear secured to said second shaft, a casing enclosing said second shaft and said gear having circular flanges thereon, a pair of internal combustion motors having casings secured respectively at one end to said flanges each of said motors having a crank shaft, a pair of shafts alined respectively with said crank shafts and driven thereby each having a pinion thereon meshing with said last mentioned gear and a clutch for connecting and disconnecting each of said shafts and the respective motors of said pair.

6. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a rotor for discharging snow, means for moving snow to said rotor, a shaft on which said rotor is mounted, a casing for said shaft having a circular flange thereon, an internal combustion motor having a casing rigidly secured at one end to said flange, resilient means spaced from said flange also supporting said motor, a shaft driven by said motor and gears connecting said last mentioned shaft and first mentioned shaft.

7. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a rotor for discharging snow, means for moving snow to said rotor, a shaft for driving said rotor, a gear secured to said shaft, a pinion meshing with said gear, a casing enclosing said shaft, pinion and gear having a circular flange thereon, an internal combustion motor having a casing secured at one end to said flange, a shaft parallel to said shaft driven by said motor for driving lsaid pinion, means for connecting and disconnecting said motor and last mentioned shaft, said first mentioned casing being carried on said frame and movably supported at one end.

8. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame having supports thereon, a rotor for discharging snow, a shaft for driving said rotor, a casing for said shaft, an internal combustion motor rigidly secured to said casing, said casing being movably mounted on said supports on said frame, resilient means spaced from said supports for holding said casing in position and means for driving said shaft from said motor.

9. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a rotor for discharging snow, means for moving snow to said rotor, an internal combustion motor having a crank shaft, a member movably mounted on said frame to which said motor is secured and an additional resilient mounting for said member.

10. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a rotor for discharging snow, means for moving snow to said rotor, an internal combustion motor movably mounted at one portion on said frame, and resiliently mounted at another portion and means for driving said rotor from said motor.

11. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, rotors for discharging snow carried thereon, means for moving snow to said rotors secured to said frame, a shaft extending between said rotors on which the same are mounted, a casing enclosing said shaft, a pair of motors supported on said casing, said casing being supported at spaced points on said frame and resilient means supporting said casing at a third point on said frame.

12. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a rotor mounted on said frame for distributing snow, a moldboard secured to said frame for moving snow to said roto-r, a shaft on which said rotor is mounted, a gear for driving said shaft, a pinion meshing with said gear, a second shaft to which said pinion is secured, a. casing enclosing said pinion and gear, an interrial combustion motor secured at one end to said casing and having a crank shaft parallel to said second shaft, means for connecting and disconnecting said second shaft and said crank shaft means on said frame on which said motor is movably supported and resilient means for additionally supporting said motor.

13. A snow plow adapted to be propelled by an automotive vehicle having in combination, .a frame, spaced rotors mounted on said frame for discharging snow, means secured to said frame for moving snow to said motors, a shaft for driving said rotors, a gear secured to said shaft, a pinion meshing with said gear, a casing enclosing said shaft, gear, and pinion and having attaching means thereon at each side of said shaft, a pair of internal combustion motors having casings secured at one end respectively to said attaching means and thus disposed respectively at either side of said shaft, means for movably supporting said motors between their ends and resilient means for supporting said motors at their other ends.

14. A snow plow adapted to be propelled by an automotive vehicle having in combination, a frame, a rotor supported on said frame for discharging snow, means secured to said frame for moving snow to said rotor, a shaft for driving said rotor, a motor for driving said shaft, a member to which said motor is secured, said member being mounted for swinging movement and resilient means for limiting said movement.

15. A snow plow having in combination, a frame, means connected to said frame adapted to be engaged by an automotive vehicle for propelling said plow, spaced rotors for discharging snow, said rotors being rotatable about .a common axis, a shaft disposed between said rotors and extending at an angle to said axis for driving said rotors, a motor disposed at each side of said shaft, driving means driven by each motor for driving said shaft and a casing movably and resiliently mounted on said frame on which said shaft .and rotors are mounted and to which said motors are secured.

HENRY J. BEHRENS. MELVIN H. BEMIS. EDWARD R. GREER. ANDREW E. MORRISON. 

